Is the high-voltage cable so hot it’s leaking oil?
Thread Content
Several YJV 22-10 cables in use are showing oil seepage from their outer insulation; this is more noticeable in one of them. What could be the cause?
It’s not the high heat load or high current that causes heat generation.
The cable load might be too high. It is also possible that the insulation layer of the cable is of poor quality, has weak weather resistance, or that the composition of the materials used to make the insulation layer is incorrect, with an excessive amount of chlorinated paraffins.
The motor connected to this cable belt has a power of 315 kW; under normal operation, the current does not exceed 20 amps, and the operating temperature is not high either
There is only one possibility: the cable quality is poor, there is an issue with the material of the insulation cover, but the insulation itself may not be defective.
It is most likely due to a change in the sheath; initially it was thought to be oil that had seeped down from the fireproofing material on the bottom plate of the high-voltage cabinet, but further inspection showed this was not the case – the entire cable exhibited this issue. Could it be that certain substances were added improperly during cable processing?